So, I worked hard to get a charred bone box, as it's a heck of a lot easier than the others, and I had 2 shards already. I went and I waited by the ruins. And waited. And waited.
Finally, I decided they must have been talking about the round ruins sw of the ones I was waiting at. None there either.
So I gotta be wondering: What's up with that?

Charred Bone Shards